Although Jane and Joe Smith have dimples, their daughter, Clarissa, does
not. Joe’s father has dimples, but his mother, and his sister, Grace, do not.
Jane’s father, Mr. Renaldo, her brother, Jorge, and her sister, Emily, do not
have dimples, but her mother does.
Hints for Analyzing Pedigrees:
• If the individual is homozygous recessive, then both
parents MUST have at least one recessive allele
(parents are heterozygous or homozygous
recessive).
• If an individual shows the dominant trait, then at
least one of the parents MUST have the dominant
phenotype. This one will be pretty obvious when
you look at the pedigree.
• If both parents are homozygous recessive, then ALL
offspring will be homozygous recessive.